The design of die structure has much influence on shape dimension and precision of the formed crank-arm with a non ellipticalsection.
对于非椭圆截面曲臂的大型曲轴，其模具结构设计对曲轴成形后的形状尺寸精度影响极大。
2
Compared with the cross-section shape of circle, square, polygon, ellipticalsection can be more effective in reduction of the load that the fluid ACTS on it.
椭圆形截面可以比圆形、方形和多边形截面更有效地折减流体对椭圆形钢管混凝土所作用的荷载。
3
The elliptical cross-section is assumed for the braiding yarn, which is more approximate to the realistic situation of the yarn in the composites.